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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrDefaultGeoProcFactory_DEFINED
#define GrDefaultGeoProcFactory_DEFINED
#include "GrGeometryProcessor.h"
class GrDrawState;
/*
* A factory for creating default Geometry Processors which simply multiply position by the uniform
* view matrix and wire through color, coverage, UV coords if requested. Right now this is only
* used in the creation of optimized draw states because adding default GPs to the drawstate can
* interfere with batching due to updating the drawstate.
*/
class GrDefaultGeoProcFactory {
public:
// Structs for adding vertex attributes
struct PositionAttr {
SkPoint fPosition;
};
struct PositionCoverageAttr {
SkPoint fPosition;
GrColor fCoverage;
};
struct PositionColorAttr {
SkPoint fPosition;
SkColor fColor;
};
struct PositionColorCoverageAttr {
SkPoint fPosition;
SkColor fColor;
GrColor fCoverage;
};
struct PositionLocalCoordAttr {
SkPoint fPosition;
SkPoint fLocalCoord;
};
struct PositionLocalCoordCoverageAttr {
SkPoint fPosition;
SkPoint fLocalCoord;
GrColor fCoverage;
};
struct PositionColorLocalCoordAttr {
SkPoint fPosition;
GrColor fColor;
SkPoint fLocalCoord;
};
struct PositionColorLocalCoordCoverage {
SkPoint fPosition;
GrColor fColor;
SkPoint fLocalCoord;
GrColor fCoverage;
};
enum GPType {
kPosition_GPType = 0x0, // we ALWAYS have position
kColor_GPType = 0x01,
kLocalCoord_GPType = 0x02,
kCoverage_GPType= 0x04,
kLastGPType = kCoverage_GPType
};
/*
* The following functions are used to create default GPs. If you just need to create
* attributes seperately from creating the default GP, use the SetAttribs function followed
* by the Create function. Otherwise use CreateAndSetAttribs to do both at once.
*
* You must unref the return from Create.
*/
// TODO clean this up
static const GrGeometryProcessor* Create(uint32_t gpTypeFlags,
GrColor,
bool usesLocalCoords,
bool coverageIgnored,
const SkMatrix& viewMatrix = SkMatrix::I(),
const SkMatrix& localMatrix = SkMatrix::I(),
uint8_t coverage = 0xff);
static size_t DefaultVertexStride() { return sizeof(PositionAttr); }
};
#endif
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